(1) The chiggers of the other species tested were found negative.
(2) Over 60 forms of parasites were found out as follows: three species of blood parasites, 12 species of Coccidia, 8 species of cestodes, 12 species of nematodes, one species of Acanthocephalus, three species of chigger mites, 15 species of gamasid mites, 6 species of ixodid ticks, fleas and lice.
(3) Chiggers were absent on Mus platythrix from a habitat about 40 meters away from the B. bengalensis and S. murinus collection sites.
(4) The 12 additional arthropod species recorded from the woodland mice consisted of 1 nidicolous beetle, Leptinus orientamericanus; 1 bot, Cuterebra fontinella; 3 fleas, Ctenophthalmus pseudagyrtes, Orchopeas leucopus and Peromyscopsylla scotti; 1 tick, Dermacentor variabilis; 2 mesostigmatid mites, Androlaelaps fahrenholzi and Ornithonyssus bacoti; 3 chiggers, Comatacarus americanus, Euschoengastia peromysci, and Leptotrombidium peromysci; and 1 undescribed pygmephorid mite of the genus Pygmephorus.
(5) R. argentiventer was host to significantly greater numbers of chiggers per rat than was R. tiomanicus.
(6) R. tsutsugamushi was isolated from chigger mites of an L. pallidum-rich group, displaying the highest titer to Karp strain.
(7) A diffuse inflammatory response occurred at the site of chigger and tick attachment which consisted of histiocyte, heterophil, fibroblast and lymphocyte infiltration that often extended into the dermis.
(8) Eleven species were identified: one flea (Orchopeas howardi (Baker], three suckling lice (Enderleinellus longiceps Kellogg & Ferris, Hoplopleura sciuricola Ferris, and Neohaematopinus sciuri Jancke), one tick (Dermacentor variabilis Say), two mesostigmatid (gamasid) mites (Androlaelaps casalis (Berlese) and A. fahrenholzi (Berlese], and four chiggers (Eutrombicula alfreddugesi (Oudemans), E. splendens (Ewing), Leptotrombidium peromysci Vercammen-Grandjean & Langston, and Parasecia gurneyi (Ewing].
(9) Chigger mites of the genus Leptotrombidium (Acari: Trombiculidae) transmit scrub typhus, caused by Rickettsia tsutsugamushi (= R.orientalis) in South-East Asia.
(10) The chicken is available as a bait animal for the study of vector mites and has been found to be infected by chigger mite bite in an area endemic of scrub typhus.
(11) An initial exposure did not elicit macroscopic changes at chigger attachment sites, while all third and fourth exposure animals had marked reactions consisting of erythema, epidermal thickening and serous exudation.
(12) New species of chiggers from Tadzhikistan are described: Leptotrombidium tamanta sp.
(13) There was an increased inflammatory response in older lizards that may have been an augmented host sensitivity following repeated exposure to chiggers.
(14) Chigger infestation may be minimized by the use of proper clothing and insect repellents.
(15) Considering the vector load and numbers of chiggers being returned to the ground by a given host, a rate of 0.5% appeared adequate to account for the prevalence rate of R. tsutsugamushi observed in the 2 host species.
(16) Histopathological effects of the chigger, Eutrombicula lipovskyana, on the mite pockets of neonatal, juvenile and adult Yarrow's spiny lizard, Sceloporus jarrovii, were investigated.
(17) Chigger infestations are caused by mite larvae that feed on the host's epidermal cells.
(18) Intense pruritus is the usual response, but more severe reactions and chigger-borne disease may also occur.
(19) The direct fluorescent antibody technique for assaying infections in chiggers proved more sensitive than mouse inoculation.
(20) Synotpic keys to the 87 genera of chiggers in the Western Hemisphere (Nearctic and Neotropical regions) as well as illustrations to the terminology employed, are presented.
Mite
Definition:
(n.) A minute arachnid, of the order Acarina, of which there are many species; as, the cheese mite, sugar mite, harvest mite, etc. See Acarina.
(n.) A small coin formerly circulated in England, rated at about a third of a farthing. The name is also applied to a small coin used in Palestine in the time of Christ.
(n.) A small weight; one twentieth of a grain.
(n.) Anything very small; a minute object; a very little quantity or particle.
Example Sentences:
(1) Where the guanine content was more than or equal to 0.25% in the dry dust, mite numbers were higher than 10 mites per 0.1 g dust in 43 of the 44 samples.
(2) The mites were resistant to coumaphos and sensitive to lindane.
(3) A more regular distribution of these mites on the animals points to the mixing of the mites population that effects the dissemination of agents.
(4) Mattress dusts from the beds of 51 asthmatic children with positive skin tests to house dust mite were assayed for Der p I, Fel d I and certain viable fungi.
(5) According to the quantitative analysis between threshold titers of skin test and RAST titers using house dust and HD mites allergens, specific IgE production shall be decreased in the patients over 40 years old.
(6) The heads were examined for adult and larval meningeal worms (Parelaphostrongylus tenuis) by physical examination of the brain surfaces, and the Baermann technique, respectively, and for ear mites by examination of ear scrapings.
(7) Female Coquillettidia perturbans collected in northern Florida were commonly parasitized by 2 species of water mites.
(8) Fifty asthmatics, candidates for hyposensitization with the house dust mite Dermatophagoides pteronyssinus (Dp), went through a series of allergy tests to evaluate the sensitivity of different organs to Dp.
(9) Mite size was only one of the determinants of intermediate host efficiency.
(10) Inhalant allergens as mite house dust, animal danders, pollens, molds and food allergens are considered, now, to be the most sensitizing agents.
(11) Most patients showed several positive skin tests to common allergens particular to grass pollen, house dust and mites (Dermatophagoides pteronyssimus).
(12) Densities of mites were much higher in skin regions with severe dermatitis.
(13) The pathogenesis of the prolific mite population is unclear, but either a specific immunologic deficit or the inability to effectively eliminate the mites by scratching is a plausible possibility.
(14) Egg (embryo) production was normal for mites treated with 0.50 krad, but significantly curtailed by doses of 0.75 krad and greater.
(15) Serum was obtained from patients with nasal allergy receiving specific immunotherapy for housedust and mites.
(16) The frequency of mites in dust from farmers' homes was three times higher and that of pyroglyphids ten times higher than in other dwellings.
(17) The radioallergosorbent inhibition test, however, suggested that there may be no cross-reactivity or, if any, only very low cross-reactivity between midge allergens and mite, house dust (HD), silk, shrimp, or mosquito allergens.
(18) This impressive immunological effect was not associated with any changes in the radio-allergo-sorbent assay (RAST) to house dust mite, or symptom scores; peak expiratory flow rates or histamine induced bronchial reactivity.
(19) In addition to mesophilic species, xerophilic moulds appear to be common, often developing together with mites.
(20) Radioallergosorbent test (RAST) studies showed that IgE antibodies to Dermatophagoides pteronyssinus (house dust mite), Aspergillus fumigatus and bovine beta-lactoglobulin were significantly elevated in the sera of infants who died as a result of the sudden death in infancy syndrome (SDIS).